has role buspirone(1+) buspirone An azaspiro compound that is 8-azaspiro[4.5]decane-7,9-dione substituted at the nitrogen atom by a 4-(piperazin-1-yl)butyl group which in turn is substituted by a pyrimidin-2-yl group at the N(4) position. anxiolytic drug azaspiro compound sedative serotonergic agonist organic heteropolycyclic compound pyrimidines N-alkylpiperazine N-arylpiperazine piperidones EC 3.4.21.26 (prolyl oligopeptidase) inhibitor